/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraEmitterViewModel.h
Gets a multicast delegate which is called any time a parameter store on a script owned by this emitter changes.
[FOnScriptParameterStoreChanged](API\Plugins\NiagaraEditor\ViewModels\FNiagaraEmitterViewModel\FOnScriptParamet-) & OnScriptParameterStoreChanged()